進食含有糖份的食物後,血液胰島素濃度便會上升,輔助細胞們吸取葡萄糖。421Please respect copyright.PENANAdEjNQFXVl0
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在利用肌肉細胞及脂肪細胞的實驗中,胰島素錄得可以在數分鐘內增強細胞的吸收葡萄糖效率2-10倍有多。421Please respect copyright.PENANAgD5GZs8SBy
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(圖2)細胞需要特定位於表面的蛋白質幫忙,才能有效吸取糖份。421Please respect copyright.PENANAkMf6FtvLP0
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GLUT4是其中一款負責吸取糖份的蛋白質,但它平常所在的位置是在細部內部、而非位於表面。421Please respect copyright.PENANAg13DMCTppR
當細胞遇上胰島素的時候,GLUT4就會轉移到細胞表面,加快細胞吸收糖份的效率。421Please respect copyright.PENANAowC6fgZKyU
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(圖3)肌肉細胞及脂肪細胞均擁有GLUT4蛋白質,因此胰島素能增強它們吸取糖份的效率。421Please respect copyright.PENANAFAdI9zKn1C
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但兩者不同的是,肌肉會將過量的糖份轉化成為糖原(Glycogen),421Please respect copyright.PENANAJRbnKqFIZA
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而脂肪細胞僅會將過量糖份的5%左右轉化成為糖原,另外的50%轉化成為脂肪(Triglyceride),其餘的則不會用作儲存。421Please respect copyright.PENANA3hIRxor7dk
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值得留意的是,餐後的葡萄糖,僅約20%會被脂肪細胞所吸收,另外80%均由其他細胞使用。421Please respect copyright.PENANAbOjqZMKmUt
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。421Please respect copyright.PENANAHX8jKANaV0
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc421Please respect copyright.PENANAdkejzvknWD
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。421Please respect copyright.PENANAi8ySRRYt3l
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Link:421Please respect copyright.PENANAgWFbEDvEQn
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio421Please respect copyright.PENANAhLF97JxTao
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除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。421Please respect copyright.PENANA0NgeSFop9O
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Ref1:https://www.cell.com/cell-metabolism/fulltext/S1550-4131(21)00126-1#fig1421Please respect copyright.PENANAqjGKpTQypC